Chain hoist



Nw. 10,1925. l 1,561,021

i A. A. QUICK cum: Ho1s1 Filed sept. 12, 1922 z shuts-511;.: 1

Now-1o', 1925. 1,561,021

l A. A. QUICK CHAIN HcIs'r Y V V Filed Sept. 12. 1922 -2 Shun-Shut 2 intatti ALFRED ARTHUR, QUICK, OF THORNBURY, VICTORIA, AUSTRALIA..

CHAIN EOIST.

Applcationlled September 12, 1922.

fo 'all wlw/nt 'it may concern Be itlrnown that ALFRED A irrnun Quien, a subject of the King of Great Britain, residing at Penders Street, Thornbury, in the State of Victoria, Commonwealth of Australia, has invented certain new and useful Improvements in and Connected with Chain Hoists, lof which the following` is a specilication.

This invention relates to improvements in and connected with chain hoists and refers especially to hosts, pulley blocks, winches and'lilre devices of the type embodying epicyclic `gearing and having a nutatmgv or.

oscillating load chain wheel.

l-litherto, in gearing of the above type it has been customary to hey the load chain wheel on a slow moving` shaft or to mount it rotatively on a stationary spindle or sphere and to operate the same through suitable mechanism from a driving or high speed shaft. rllhis construction necessitates the use of two shafts or spindles (in most cases arranged concentrically with each other) which are so arranged as to render it diilicultor` impossible to manufacture a hoist in a compact form. rllhe disadvantage incidental to chain hoists of the above type is that the introduction of hall or roller bearings to reduce friction between the surfaces of moving parts unduly increases the size thereof and in the case Vof pulley blocks necessitates an increase in headroom.

Now the object ofthe present invention is to provide a chain hoist of compact construction wherein ball or relier bearings can be utilized throughout without `unduly increasing the size thereof and whereby the same will operate witn a maximum eliiciency from the expenditure of a minimum of power and whereby it will permit of variation in speed and reversal of direction ofrotation as may be required.

l accomplish the abete-mentioned object :by providing a chain hoist wherein inter alia a load chain wheel is mounted to rotate on hall hearings carried on an angularly disposed portion of an axle having coaxial end portions and means for effecting the rotation thereof whereby a nutating or oscillating motion is imparted to the said load chain wheel and gear teeth thereon will mesh \.vith and roll around a lined ring of internal bevel teeth.

The invention also embodies an automatically controlled friction brake comprising a Serial lilol 587,8()0.

sleeve mounted to `rotate within theiiXed ring of bevel teeth and carrying a ball beari of the axle is in operation in one direction the axle will rotate freely in the ball bearing and when operating in the reverse direction the pawl will lock the sleeveto the axle and the frictionai resistance between the opposed surfaces of the said sleeve and the seating therefor will hold the load.

@ther salient features of the invention reside in the provision of means for varying the speeds and of compensating means `for enabling an equal distribution of the stresses when two sets of gears are used in the invention.

ln order that the invention may be readily understood reference will now be had to the accompanying sheets of explanatory drawings wherein .Figure l is a View in perspective of a simple form of lever operated `hoist constructed in accordance with the invention.

.Figure 2 is a view in sectional elevation of a hoist similar to that shown in Figure l.

Figure y axle for supporting the nutating or oscillating wheel.

Figure lis a view in sectional side elevation of a modified form of hoist adapted for obtaining different variations in speeds.

Figure 5 is a view in end elevation of a further modified form of pulley block embodying the improvements comprised in the invention, portion being shown broken away for convenience of illustration.

Figure 6 is a View in sectional side elevatien taken on the dotted line 6 6 of Figure 5.

Figure 7 is a view in perspective of a detail in `the construction of pulley block shown in Figures 5 and 6.

Referring to Figures l to of the drawings, the numeral l() designates a casing which is provided at one end with a flange ll adapted to take bolts l2 for securing the said casing to a wall or other suitable support.

rllhe casing is formed with openings lli and let in its circumference through which a load hauling chain or rope is admitted and emitted. One end of the casing l0 is partially closed by an inwardly projectii'ig 3 is a view in perspective of an to suit the direct-ion oli operation ot the loafl chain Wheel.

ln operation the axle is rotated by means of the hanclle causing; the axis of the load chain Wheel to tlescrihe a conical path anni the ring or series off internal bevel teeth on said Wheel to roll upon the lined ring or series ot teeth. By reason olf the tact that theii'e are more teeth in the ring or series oli teeth upon the load chain Wheel than i the ring` or series ot tixefl teeth the is a for- Warfl rotating movement infipartet` load Wheel which therefore Winds or hauls the chain.

Assuming there are nineteen teeth in the liXeCl ring ot teeth and twentyT teeth in the ring` on the load Chain Wheel then each revolution of the axle Will advance the saitl Wheel one tooth theieby effecting a reduction in the speeil of twenty to one.

lt Will be obvious that a ring` oi2 teeth similar to the teeth 2e can he :termed on the let't hand side oit the load chain Wheel shown in Figure 2 and a ring of teeth similar to 23 can he formed on the adjacent enel oit' the casing. This arrangement ot tlouhle sets of teeth etl'ect a more even halancing` of the stresses on the operative parts oit the hoist.

providing furtheif rin s ot teeth Within the :tor locking` either ot the V:first mentioned` ln this View both ends oli the casino are open anrl` rings of bevel teeth 23 and 23 are rotativelT mounted in the ensls thereot and adapted to mesh With internal bevel teeth 24; and 24e on opposite sitios ot the load chain Wheel.

The number ot teeth in one enclv ring` is greater than the number oi? teeth in the otherl end ring and the numher of the teeth 2111 and 24 on opposite siales ot the loafl chain wheel `varies to corresponflL thereto. 'lhe end rings of teeth 23 and 28 rotatively mounted in the casing1 l0 and are retained therein by halls and hall faces LiL-2. it. flange or plate lf3 is tormeil on or littetlto the outer fases ot the enfl rings and the said lange or plate is formed with one or more holes or recesses to take the end oit a holt "ill slitlahly mounted in the casing.

The purpose oilt the holt is to loes eithei ot the rings oit teeth 13 and 28 to the easing` While leaving; the other ring 'free to rotate.

The holt can he provided with an operat- 'nl linolo or hanle 45 which can he plaeefl in engagement with a rael fl@ on the casing to Retain it 'n an adjusted position.

tssuming that the loatl Chain Wheel is formeel with twentyY teeth on one siale an'l thirty7 teeth on the other .si-cle and that the teeth in the coasting1 rings ae one lessin ninnher it is possible to ohtain two speen. ratios giving twenty ant thirtjfY to one reluctionsllhen thn holt le is loeatecl in a central or neutral po Ai oth entl ehugs ot hea/'el teeth will he tree to rotate.

ln AFigures anfl T ot the clrav-ings wherein the inv ntiou is shown as ailapt to a putlejyv hloeh the axle is rotated hy means of a hand ehain Wheel e? in lieu ol" f-lie lever E2G.

ln this instance the easing;l is proviletl with hooh 'for s spending the pulley bloeit from an. oVerhees support and the two end rin have a corvespondine' number of teeth which mesh n' i rings ol teeth on both sides oil the load chain wheel.

The hantl Wheel i1-7 is secured igitlly to the axle and carries u. hell-crank pawl L9 Which aalaptefl to with the teeth on the 'll nge of the brake sieeve when the tlirei n ot the saitl hanl chain Wheel is reversed.

rhe outer ot the pawl #t9 tormett with two Vflat raised taees against one ot which a spring 5i is aflapterl to heal to keep periphery of the toothed Vflange on thehralt'e sleeve 1'?.

llllhon the pawl is rotated on its pivot to place the secoiul raised tace against the spring` it Will he retained in its adjustetl position and will click over the teeth on f hrzhe sleeve when the paille)Y lvloek one in operation. y

rEhe arrows shown in Figures 5 anti 7 inA tlieate 'Llii'eetion ot rotation of the hand. chain Wheel and; the brake pawl in position to lering the brake into operation upon the reversal ot the movement ot the saiil Wheel.

When it is desired to reverse the operation e ot the hand chain Wheel to raise or lower Weights the operator pulls on a cord 52 which passes over a guide pullei7 on the casinp` and connected to a holt 53 ffliflahly niounteel in the said easing.

The movement the holt f' clue to the pull on the cord causes tle the ot the brake mel position should the operator keep u pull on the cord while the hund hein wheel Completes :i revolution.

rlhe pulleyv lilocl: shown in und 7 is (i ed with n no, genv for ensblin the Chain loud wheel l'f') lig" tnted reelif' and niesh Correctly with the eiicls';1' i'ojeetino feng. .ternir-d in end li l seffiiieil hy sere the like to the outer ol the ond oi? teeth and 23.

C ll

ined-e es d so as to euse the compensating de Y, with to enable the inoperative end rinji oA teeth to rotate Within the cosine.

Alternatively u single se't scribed with reference to a required reduction oill speed.

rEhe gearing described in the 'toregoing specification has onlj,T one set et gears on each side oi? the chain load Wheel but it will be obvious that tivo or more sets oil Concentrioally arranged interineshing gears can be provided to ei'eet further reductions in speed :recording to any Well known principle ot construction.

Likewise it will be reedilVv understoiidthat the inounting or the load chain Wheel can be utilized in gearing eclspted to elifert :i inultiplieetion of the driving` speed.

A hoist or prille;T bloeli Constriioted in uecordanee with the invention can he eesilj,Y lubricated, will operate with :i niiiiiinuin oit friction and the parts een be easily assembled snd disinnntled for repairs or other purposes.

l olaiin:

l. ln a Chain hoist embodying en ri-ngi'.- lerljg7 disposed imitating or oscillating load Chain Wheel furnished with bevel gear teeth interineshing with e ring of external bevel teeth, an axle passing axially through the ring of teeth and having an engularly dieH posed central portion passing axially: through the nuteting loud chain wheel, bull bearings on the singularly disposed portion of the axle carrying the seid load rhein Wheel, ball bearings for the eo-erisl end portions or' the said axle, and ineen-fs on one end oit' the axle for imparting rotation there- .L havin wheel having geur teeth :i ring of teeth, :in axle il end portions and en anguliirly disq Central portion adapted to support the n f or osoillnting Wheel, a brake sleevxn coi'irentrieally d =poseir within the ring ot gear teeth, en :intitrictional brake sleeve for one of bearing` Within lle K the end portie; of the axle, end ineens for locking the brake sleeve to the asile When the letter is rotated in one lii V@tion und for permitting independen. rotation o the axle in the opposite direction.

A chain hoist as claimed in olaiin 3 in which ineens are provided for retaining the brake sleeve within the ring oi' bevel teeth, seid looking ineens including a, spring zictuzited reversible pzmvl carried b v a driving ineinber and engaging with teeth provided on the seid brake sleeve.

7. ln zt chain hoist, a nutating or oscillating lend chain Wheel having gear teeth in shing with s.. ring of gear teeth, en axle having eo-ziziiel end portions and :in angu-` lnrly disposed central portion adapted to snpport the nutziting or oscillating Wheel, u rotatably mounted brake sleeve conoentrinelly disposed Within the ring of geur teeth, in anti-riotionel bearing' within the brake sleeve for one end portion ot the aille, ineens for loeliino' the brake sleeve to the iz-ile when the letter is rotated in one direction and for permitting rotation o t the axle in the opposite direction, ieid ineens including` an opersting ineinber Connected to one end of the axle, s reversible pavfl pivoted to the operating ineinber and adapted to engage with the teeth of the brake sleeve, and a spring :ittuched to the operating' ineinber and detnohubly engging the outer end of ,said reversible puwl.

6. A chain hoist including u easing, e ring of external bevel gear teeth inounted rotativelyv in each end ot the easing, u brake sleeve mounted ooncentrieally within one ring of bevel gear teeth, an axle mounted in ball bearings supported by the brake sleeve and the ring of bevel geur teeth in the opposite end of the easing, an angularly disposed portion on the axle between the rings of bevel gear teeth, a nutating weiber load Wheel mounted revolvably on the angularly disposed portion of the axle, rings of internal bevel gear teeth on opposite sides of the load wheel and meshing 1with the rings of external bevel gear teeth, a hand chain Wheel. on the asile :for imi'iart ing rotation thereto, a lever osoillatingl,y supported on the easing, and loose connestions between the ends of the lever and the rings of external bevel gear teeth substantially as described.

7. A Chain hoist including a easing, a ring of external gear teeth mounted rota tively in each end thereof,` a brake sleeve mounted ooncentrioally Within one ring of bevel gear teeth, an axle mounted in ball bearings supported by the brake sleeve and the ring of bevel gear teeth in the opposite end of the easing, an angularly disposed portion on the a-Xle between the rings of bevel gear teeth, a nutating load Wheel mounted revolvably on the angularly disposed portion of the axle, rings of internal bevel gear teeth ,on opposite sides of the load Wheel meshing with the rings of external bevel gear teeth, a hand chain Wheel on the axle for imparting rotation thereto, a lever oseillatingly supported on the easing, loose con* neetions between the ends of the lever and the rings of external bevel gear teeth, a flange on the outer end of the brake sleeve, radially disposed teeth on the flange, a reversible pavvl pivoted to the inside of the hand Chain Wheel and having angnlarly dis'- posed arms, a spring adapted to maintain either ofy 'the arms in engagement With the teeth on the flange, and means for tripping the paWl to bring the other arm into enwill all* gagement with the teeth on the said flange,

substantially as described.

8. A chain hoist including a easing, a ring oil? external bevel gear teeth mounted rotatively in eaoh end thereof, a brake sleeve mounted eoneentrioally Withinone ring of bevel gear teeth, kan axle mounted in ball bearings supported by the brake sleeve and the ring of bevel gear teeth inthe opposite end of the easing, an angularly disposed portion on `the axle between the rings of bevel gear teeth, a nutati'i'ig load Wheel mounted revolvably on the angularly disposed portion ol. the axle, rings of internal bevel gear teeth on opposite sides ol `the load Wheel and meshing with the rings of external bevel gear teeth, a hand Chain Wheel on the axle, a lever oseillatingly supported on the easing, loose Connec-v tions between the ends ot the lever and the rings of external bevel gear teeth, a flangev on the outer end of the brake sleeve, ra-

dially disposed teeth on the llange, a reversible paivl pivoted to the inside of' the hand chain Wheel and having angularly dispesed arms, a spring adapted to maintain either of the arms in engagement With the teeth on the flange, a sliding bolt on the easing, a guide pulley on the easing, a flexible member connected to Vone end of the bolt and passing around the guide pulley, a springV for returning the bolt to its normal position, and bevelled faces on the arms ofthe pavvls, substantially as described.

ln testimony ivhereolhe has afliied his signature.

ALFRED ARTHUR QlUlCl. 

